Adler Trumpf P389F Code:

OBD-II Diagnostic Powertrain (P) Trouble Code

Trouble In Adler Trumpf P389F Possible Cause

The reason for Adler Trumpf P389F the speedometer may fluctuate wildly or fail to operate, the engine may stall when coming to a stop, engine misfire, sag, stall, or hesitation, a stored code, and possibly an illuminated service engine soon lamp.

Common Symptoms For Adler Trumpf P389F

  1. If the code immediately returns, check for reference voltage and ground signals at the input/output speed sensors
  2. This signal is systematically forwarded to affected control modules that utilize the data to accomplish various other tasks
  3. If the initial resistance is within specifications, leave the leads of the digital volt/ohmmeter connected and heat the resistor with a heat gun
  4. As exhaust temperature decreases (with the engine off), circuit resistance increases and the feedback voltage signal to the PCM decreases

Similar Problems

Computer And Auxiliary Outputs
BBV Sensor Circuit Low Voltage
TFP Valve Position Switch-Drive Without Drive Ratio

Adler Trumpf P389F Troubleshooting

When you put your foot down on the brakes you expect your car to quietly slow down and come to a stop. The power your foot applies on the brake pedal is assisted by hydraulic pressure. Your foot's force engages a piston and caliper with brake pads attached (bonded abrasive and heat resistance metal or ceramic) to put pressure on the rotor. Adler Trumpf P389F OBD2 reports a sensor fault, replacement of the sensor is unlikely to resolve the underlying problem. The fault is most likely to be caused by the systems that the sensor is monitoring, but might even be caused by the wiring to the sensor itself.

How to turn off Adler Trumpf P389F check engine light ?

There are two ways to turn off the check engine light:

A repair technician can do so once repairs have been made.
The OBD II can automatically turn it off when it fails to detect the problem after several diagnostic cycles.

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